mirror of
https://akkoma.dev/AkkomaGang/akkoma.git
synced 2024-11-24 07:16:18 +00:00
288 lines
8.2 KiB
Elixir
288 lines
8.2 KiB
Elixir
# Pleroma: A lightweight social networking server
|
|
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
|
|
# SPDX-License-Identifier: AGPL-3.0-only
|
|
|
|
defmodule Pleroma.Web.WebFinger do
|
|
@httpoison Application.get_env(:pleroma, :httpoison)
|
|
|
|
alias Pleroma.User
|
|
alias Pleroma.Web
|
|
alias Pleroma.Web.OStatus
|
|
alias Pleroma.Web.Salmon
|
|
alias Pleroma.Web.XML
|
|
alias Pleroma.XmlBuilder
|
|
require Jason
|
|
require Logger
|
|
|
|
def host_meta do
|
|
base_url = Web.base_url()
|
|
|
|
{
|
|
:XRD,
|
|
%{xmlns: "http://docs.oasis-open.org/ns/xri/xrd-1.0"},
|
|
{
|
|
:Link,
|
|
%{
|
|
rel: "lrdd",
|
|
type: "application/xrd+xml",
|
|
template: "#{base_url}/.well-known/webfinger?resource={uri}"
|
|
}
|
|
}
|
|
}
|
|
|> XmlBuilder.to_doc()
|
|
end
|
|
|
|
def webfinger(resource, fmt) when fmt in ["XML", "JSON"] do
|
|
host = Pleroma.Web.Endpoint.host()
|
|
regex = ~r/(acct:)?(?<username>\w+)@#{host}/
|
|
|
|
with %{"username" => username} <- Regex.named_captures(regex, resource),
|
|
%User{} = user <- User.get_by_nickname(username) do
|
|
{:ok, represent_user(user, fmt)}
|
|
else
|
|
_e ->
|
|
with %User{} = user <- User.get_cached_by_ap_id(resource) do
|
|
{:ok, represent_user(user, fmt)}
|
|
else
|
|
_e ->
|
|
{:error, "Couldn't find user"}
|
|
end
|
|
end
|
|
end
|
|
|
|
def represent_user(user, "JSON") do
|
|
{:ok, user} = ensure_keys_present(user)
|
|
{:ok, _private, public} = Salmon.keys_from_pem(user.info.keys)
|
|
magic_key = Salmon.encode_key(public)
|
|
|
|
%{
|
|
"subject" => "acct:#{user.nickname}@#{Pleroma.Web.Endpoint.host()}",
|
|
"aliases" => [user.ap_id],
|
|
"links" => [
|
|
%{
|
|
"rel" => "http://schemas.google.com/g/2010#updates-from",
|
|
"type" => "application/atom+xml",
|
|
"href" => OStatus.feed_path(user)
|
|
},
|
|
%{
|
|
"rel" => "http://webfinger.net/rel/profile-page",
|
|
"type" => "text/html",
|
|
"href" => user.ap_id
|
|
},
|
|
%{"rel" => "salmon", "href" => OStatus.salmon_path(user)},
|
|
%{
|
|
"rel" => "magic-public-key",
|
|
"href" => "data:application/magic-public-key,#{magic_key}"
|
|
},
|
|
%{"rel" => "self", "type" => "application/activity+json", "href" => user.ap_id},
|
|
%{
|
|
"rel" => "self",
|
|
"type" => "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"",
|
|
"href" => user.ap_id
|
|
},
|
|
%{
|
|
"rel" => "http://ostatus.org/schema/1.0/subscribe",
|
|
"template" => OStatus.remote_follow_path()
|
|
}
|
|
]
|
|
}
|
|
end
|
|
|
|
def represent_user(user, "XML") do
|
|
{:ok, user} = ensure_keys_present(user)
|
|
{:ok, _private, public} = Salmon.keys_from_pem(user.info.keys)
|
|
magic_key = Salmon.encode_key(public)
|
|
|
|
{
|
|
:XRD,
|
|
%{xmlns: "http://docs.oasis-open.org/ns/xri/xrd-1.0"},
|
|
[
|
|
{:Subject, "acct:#{user.nickname}@#{Pleroma.Web.Endpoint.host()}"},
|
|
{:Alias, user.ap_id},
|
|
{:Link,
|
|
%{
|
|
rel: "http://schemas.google.com/g/2010#updates-from",
|
|
type: "application/atom+xml",
|
|
href: OStatus.feed_path(user)
|
|
}},
|
|
{:Link,
|
|
%{rel: "http://webfinger.net/rel/profile-page", type: "text/html", href: user.ap_id}},
|
|
{:Link, %{rel: "salmon", href: OStatus.salmon_path(user)}},
|
|
{:Link,
|
|
%{rel: "magic-public-key", href: "data:application/magic-public-key,#{magic_key}"}},
|
|
{:Link, %{rel: "self", type: "application/activity+json", href: user.ap_id}},
|
|
{:Link,
|
|
%{rel: "http://ostatus.org/schema/1.0/subscribe", template: OStatus.remote_follow_path()}}
|
|
]
|
|
}
|
|
|> XmlBuilder.to_doc()
|
|
end
|
|
|
|
# This seems a better fit in Salmon
|
|
def ensure_keys_present(user) do
|
|
info = user.info
|
|
|
|
if info.keys do
|
|
{:ok, user}
|
|
else
|
|
{:ok, pem} = Salmon.generate_rsa_pem()
|
|
|
|
info_cng =
|
|
info
|
|
|> Pleroma.User.Info.set_keys(pem)
|
|
|
|
cng =
|
|
Ecto.Changeset.change(user)
|
|
|> Ecto.Changeset.put_embed(:info, info_cng)
|
|
|
|
User.update_and_set_cache(cng)
|
|
end
|
|
end
|
|
|
|
defp get_magic_key(magic_key) do
|
|
"data:application/magic-public-key," <> magic_key = magic_key
|
|
{:ok, magic_key}
|
|
rescue
|
|
MatchError -> {:error, "Missing magic key data."}
|
|
end
|
|
|
|
defp webfinger_from_xml(doc) do
|
|
with magic_key <- XML.string_from_xpath(~s{//Link[@rel="magic-public-key"]/@href}, doc),
|
|
{:ok, magic_key} <- get_magic_key(magic_key),
|
|
topic <-
|
|
XML.string_from_xpath(
|
|
~s{//Link[@rel="http://schemas.google.com/g/2010#updates-from"]/@href},
|
|
doc
|
|
),
|
|
subject <- XML.string_from_xpath("//Subject", doc),
|
|
salmon <- XML.string_from_xpath(~s{//Link[@rel="salmon"]/@href}, doc),
|
|
subscribe_address <-
|
|
XML.string_from_xpath(
|
|
~s{//Link[@rel="http://ostatus.org/schema/1.0/subscribe"]/@template},
|
|
doc
|
|
),
|
|
ap_id <-
|
|
XML.string_from_xpath(
|
|
~s{//Link[@rel="self" and @type="application/activity+json"]/@href},
|
|
doc
|
|
) do
|
|
data = %{
|
|
"magic_key" => magic_key,
|
|
"topic" => topic,
|
|
"subject" => subject,
|
|
"salmon" => salmon,
|
|
"subscribe_address" => subscribe_address,
|
|
"ap_id" => ap_id
|
|
}
|
|
|
|
{:ok, data}
|
|
else
|
|
{:error, e} ->
|
|
{:error, e}
|
|
|
|
e ->
|
|
{:error, e}
|
|
end
|
|
end
|
|
|
|
defp webfinger_from_json(doc) do
|
|
data =
|
|
Enum.reduce(doc["links"], %{"subject" => doc["subject"]}, fn link, data ->
|
|
case {link["type"], link["rel"]} do
|
|
{"application/activity+json", "self"} ->
|
|
Map.put(data, "ap_id", link["href"])
|
|
|
|
{"application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"", "self"} ->
|
|
Map.put(data, "ap_id", link["href"])
|
|
|
|
{_, "magic-public-key"} ->
|
|
"data:application/magic-public-key," <> magic_key = link["href"]
|
|
Map.put(data, "magic_key", magic_key)
|
|
|
|
{"application/atom+xml", "http://schemas.google.com/g/2010#updates-from"} ->
|
|
Map.put(data, "topic", link["href"])
|
|
|
|
{_, "salmon"} ->
|
|
Map.put(data, "salmon", link["href"])
|
|
|
|
{_, "http://ostatus.org/schema/1.0/subscribe"} ->
|
|
Map.put(data, "subscribe_address", link["template"])
|
|
|
|
_ ->
|
|
Logger.debug("Unhandled type: #{inspect(link["type"])}")
|
|
data
|
|
end
|
|
end)
|
|
|
|
{:ok, data}
|
|
end
|
|
|
|
def get_template_from_xml(body) do
|
|
xpath = "//Link[@rel='lrdd']/@template"
|
|
|
|
with doc when doc != :error <- XML.parse_document(body),
|
|
template when template != nil <- XML.string_from_xpath(xpath, doc) do
|
|
{:ok, template}
|
|
end
|
|
end
|
|
|
|
def find_lrdd_template(domain) do
|
|
with {:ok, %{status: status, body: body}} when status in 200..299 <-
|
|
@httpoison.get("http://#{domain}/.well-known/host-meta", []) do
|
|
get_template_from_xml(body)
|
|
else
|
|
_ ->
|
|
with {:ok, %{body: body}} <- @httpoison.get("https://#{domain}/.well-known/host-meta", []) do
|
|
get_template_from_xml(body)
|
|
else
|
|
e -> {:error, "Can't find LRDD template: #{inspect(e)}"}
|
|
end
|
|
end
|
|
end
|
|
|
|
def finger(account) do
|
|
account = String.trim_leading(account, "@")
|
|
|
|
domain =
|
|
with [_name, domain] <- String.split(account, "@") do
|
|
domain
|
|
else
|
|
_e ->
|
|
URI.parse(account).host
|
|
end
|
|
|
|
address =
|
|
case find_lrdd_template(domain) do
|
|
{:ok, template} ->
|
|
String.replace(template, "{uri}", URI.encode(account))
|
|
|
|
_ ->
|
|
"https://#{domain}/.well-known/webfinger?resource=acct:#{account}"
|
|
end
|
|
|
|
with response <-
|
|
@httpoison.get(
|
|
address,
|
|
Accept: "application/xrd+xml,application/jrd+json"
|
|
),
|
|
{:ok, %{status: status, body: body}} when status in 200..299 <- response do
|
|
doc = XML.parse_document(body)
|
|
|
|
if doc != :error do
|
|
webfinger_from_xml(doc)
|
|
else
|
|
with {:ok, doc} <- Jason.decode(body) do
|
|
webfinger_from_json(doc)
|
|
else
|
|
{:error, e} -> e
|
|
end
|
|
end
|
|
else
|
|
e ->
|
|
Logger.debug(fn -> "Couldn't finger #{account}" end)
|
|
Logger.debug(fn -> inspect(e) end)
|
|
{:error, e}
|
|
end
|
|
end
|
|
end
|